Journal ArticleDOI
Microstructure and toughness of the CGHAZ of an offshore platform steel
TLDR
In this article, the microstructure of the coarse grain heat affected zone (CGHAZ) of an offshore platform steel exhibited a gradual transition from lath bainite/martensite (LB/LM) to granular bainitic (GB) with increasing cooling time.About:
This article is published in Journal of Materials Processing Technology.The article was published on 2015-05-01. It has received 48 citations till now. The article focuses on the topics: Bainite & Toughness.read more
Citations
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Stress corrosion cracking of E690 steel as a welded joint in a simulated marine atmosphere containing sulphur dioxide
TL;DR: Stress corrosion cracking behavior and mechanism of E690 welded joint in simulated marine atmosphere containing SO2 were investigated using SSRT method and electrochemical measurements Results showed that it had very high SCC susceptibility in this environment with a combined mechanism of anodic dissolution and hydrogen embrittlement (HE).
Journal ArticleDOI
Effects of heat input on microstructure and fracture toughness of simulated coarse-grained heat affected zone for HSLA steels
TL;DR: In this article, the microstructure of simulated CGHAZ with heat input of 10-100kJ/cm was quantified and the crack tip opening displacement (CTOD) at −20°C was evaluated.
Journal ArticleDOI
Deep penetration fiber laser-arc hybrid welding of thick HSLA steel
TL;DR: In this paper, a laser-arc hybrid welding of 45 mm thick steel with variation in a wide range of process parameters was investigated, and a high volume fraction of acicular ferrite formed in the upper layers was obtained.
Journal ArticleDOI
Role of bainitic microstructures with M-A constituent on the toughness of an HSLA steel for seismic resistant structural applications
Dileep Chandran Ramachandran,Dileep Chandran Ramachandran,Joonoh Moon,Chang-Hoon Lee,Sung-Dae Kim,Jun-Ho Chung,Elliot Biro,Yeong-Do Park +7 more
TL;DR: In this paper, the combined effect of martensite-austenite (M-A) constituents with bainitic microstructures (BF, granular bainite (GB), polygonal ferrite (PF), and granular Bainite with low angle grain boundaries (LAGBs) was examined.
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Microstructural evolution and its influence on toughness in simulated inter-critical heat affected zone of large thickness bainitic steel
TL;DR: In this paper, simulated intercritical heat affected zones (ICHAZ) of a large thickness bainitic steel were prepared with three different peak temperatures (Tp) of 750,°C, 780 and 800°C.
References
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Journal ArticleDOI
Crystallographic features of lath martensite in low-carbon steel
TL;DR: In this article, electron backscattering diffraction with field-emission scanning electron microscopy was used to analyze crystallographically the lath martensite structure in a 0.20% carbon steel.
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Electron backscattering diffraction study of acicular ferrite, bainite, and martensite steel microstructures
TL;DR: In this article, the authors examined acicular ferrite, bainite, and martensite microstructures observed in three low-alloy steels and used electron backscattering diffraction (EBSD) to assess crystallographic features.
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Austenite to bainite phase transformation in the heat-affected zone of a high strength low alloy steel
TL;DR: In this article, the authors investigated the austenite to bainite phase transformation in a low alloy structural steel after simulated welding heat treatment, by means of light microscopy, electron backscatter diffraction and transmission electron microscopy.
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Analysis of different acicular ferrite microstructures in low-carbon steels by electron backscattered diffraction. Study of their toughness behavior
TL;DR: In this paper, the morphology of the obtained intragranular microstructures has been found to depend on the steel composition, the prior austenite grain size, and the density of particles able to promote intra-granular nucleation.
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Mechanisms and modeling of cleavage fracture in simulated heat-affected zone microstructures of a high-strength low alloy steel
TL;DR: In this paper, the effect of welding cycle on the fracture toughness properties of high-strength low alloy (HSLA) steels is examined by means of thermal simulation of heat-affected zone (HAZ) microstructures.